Sample collection of African basil and Ashwagandha for molecular analysis, start by selecting healthy plants from different geographical locations to ensure genetic diversity. For basil, collect leaves from the top of the plant. For Ashwagandha, collect both leaves and roots. Prior to analysis, grind the samples into a fine powder using liquid nitrogen and a mortar and pestle. Then, extract DNA using a reliable kit or protocol. Ensure proper storage conditions for extracted DNA until analysis.